where \(a=0.7\)  fm, \(R_{A}=1.2A^{1/3}\)  fm is the nucleus radius with
\(A\)  being the number of nucleons, and \(\rho ^{0}=3A/(4\pi R_{A}^{3})\) 
is the nucleon number density to make \(F(q=0)=1\)  [1]}.
One can also choose \(R_{A}=1.1A^{1/3}\textrm {fm}\)  as in Ref. [2]}, [3]}.
